*[Activity Streams Test Documents](https://github.com/w3c-social/activitystreams-test-documents)
*[LevelGraph JSON-LD](https://github.com/levelgraph/levelgraph-jsonld) “LevelGraph-JSONLD is a plugin for LevelGraph that adds the ability to store, retrieve and delete JSON-LD objects. In fact, it is a full-blown Object-Document-Mapper (ODM) for LevelGraph.” (Also see: [this video](http://nodejsconfit.levelgraph.io), by the author.)